Clip-on sunglasses



FIG. 1 is a front elevation view of clip-on sunglasses showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a left side elevation view thereof, the right side being a mirror image thereof.

The broken lines are directed to environment or unclaimed features. The broken lines form no part of the claimed design. 

CLAIM I claim the ornamental design for clip-on sunglasses, as shown and described. 